复杂地形对污染物扩散影响的CALPUFF模型研究

Effects on pollutant dispersion over complex terrain on CALPUFF model

本文应用WRF/CALPUFF模型模拟了湖南省桃花江内陆核电站厂址野外示踪试验,研究受复杂地形影响下的SF烟羽扩散规律,并与现场试验进行对比分析。结果表明:受到地形的影响,风向会发生改变,污染物扩散轨迹随之改变,地形是影响SF扩散轨迹的重要因素。同时,应用统计学参数分析模拟结果的合理性,其中FAC与FAC值分别为30.1%与57.7%,说明模拟扩散因子与现场试验扩散因子之间吻合较好。总之,研究表明CALPUFF模型能较好地模拟复杂地形条件下的污染物扩散。

In this paper,the WRF/CALPUFF model is used to simulate a tracer experiment at Taohuajiang Inland Nuclear Power Plant in Hunan Province,and the plume dispersion of SFin complex terrain is studied.The simulated results are compared with field experiment results.The results show that the dispersion of SFapproximates a Gaussian distribution with the distance from the sample points to the release point,and the maximum value of SFdispersion factor appears at 1.2 km from the release point.Terrain is an important factor affecting the dispersion trajectory of SF.In addition,the statistical parameters are used to analyze the feasibility of model.The value of FACand FAC5 is 30.1%and 57.7%,respectively.These values show that the simulated dispersion factor are better in agreement with the observed dispersion factor.In conclusion,the CALPUFF model can simulate the dispersion of pollutants over complex terrain.